JPH11210400A - Backup deck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backup deck which can facilitate the elongating operation of a continuous belt conveyor while effectively avoiding damage of the belt resulting from drop impact of debris. SOLUTION: A belt conveyor frame has a working surface approx. horizontal and long stretching to the front and rear and can run freely forward and backward while the forefront of a continuous belt conveyor 5a installed in a tunnel 1 is placed on the working surface. The belt conveyor frame (T-shape frame 5b) is integrally equipped with a second belt conveyor 5c' to transport debris crushed matter discharged from a working face and a hopper 5d which receives the debris and discharges it to the forefront part of the belt conveyor 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous belt conveyor for excavating tunnels using a continuous belt conveyor. About a backup deck.

[0002]

2. Description of the Related Art In a conventional tunnel excavation using a continuous belt conveyor, for example, a crusher or a tunnel boring machine arranged in front of the face and in front of the continuous belt conveyor crushes the excavated waste to obtain an even size. And crushed materials are placed directly on the end of a continuous belt conveyor and transported to a wellhead by the continuous belt conveyor.

According to such tunnel excavation, a continuous belt conveyor is used as a system for excavating and shifting in a tunnel excavation instead of using a dump truck, so that the working environment in the mine can be improved. On the other hand, since the continuous belt conveyor has a configuration in which a surplus portion of an endless belt having a length dimension capable of being conveyed at the time of maximum excavation extension is accommodated in a cassette at a rear end portion, it is necessary to carry out a setup change. It is possible to sequentially stretch the portion by a required length dimension, which contributes to a request for rapid construction.

[0004]

However, in the type in which the crushed material discharged from the face is directly received by the endless belt of the continuous belt conveyor, the belt is damaged by the impact when the crushed material falls. Causes a problem that is accelerated.

[0005] For example, even if a problem such as a cut portion occurs at one place of the endless belt due to an impact at the time of dropping of metal or the like mixed in the crushed material, the continuous belt conveyer may be in the vicinity of the face. Since it is configured integrally from the tip to the cassette at the rear end located at the wellhead, it is necessary to stop and repair the entire continuous belt conveyor, and it is not possible to transport the crushed material during that time.
This would be contrary to the demands of rapid construction, and in some cases would have to be replaced over a very long dimension, which would require a very large replacement.

On the other hand, among the operations constituting the continuous belt conveyor stretching operation, the belt stretching operation can be performed relatively easily by using a cassette at the rear end, while the belt for rotatably supporting the belt is supported. The extension work of the conveyor frame unit is quite troublesome because it is necessary to perform the connection work of the heavy end unit (including the end pulley) to the belt conveyor frame unit at the installation height of the continuous belt conveyor, and the like. .

[0007] Therefore, an object of the present invention is to effectively avoid damage to a belt due to an impact at the time of falling of a crushed scrap.
An object of the present invention is to provide a backup deck capable of achieving an easy stretching operation of a continuous belt conveyor.

[0008]

In order to achieve the above object, a backup deck according to the present invention has a substantially horizontal, long front-to-back work surface, and is disposed in a tunnel on the work surface. A second belt conveyor for transporting the crushed material discharged from the face above the belt conveyor gantry that can move back and forth while placing the leading end of the continuous belt conveyor, and receiving the crushed material, It is characterized in that a hopper for discharging to the end of the belt conveyor is integrally provided.

That is, according to the present invention, the crushed material is supplied to the continuous belt conveyor with the second belt conveyor and the hopper interposed therebetween, so that the belt of the continuous belt conveyor is damaged by the impact when the crushed material falls. On the other hand, while the front end of the continuous belt conveyor can be moved back and forth while placed on a work surface that is approximately horizontal and long, so that the continuous belt conveyor can be easily extended. What you want to do.

[0010] In such technical means, any structure and type can be used as long as the above-mentioned constitutional requirements are satisfied and the continuous belt conveyor can be supported with good stability during operation. It is preferable to include an outrigger from the viewpoint of ensuring the performance and stability, and to obtain a reaction force from the face side from the viewpoint of easier and quicker stretching of the continuous belt conveyor. It is preferable to include a traction device for traveling forward.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the accompanying drawings.

FIG. 1 is a schematic side view showing an operation state of tunnel excavation to which an embodiment of a backup deck according to the present invention is applied. In the present embodiment, a case where tunnel excavation is performed by a blasting method and using a mobile crusher will be described. However, the present invention is not limited to this, and a tunnel excavation method using a machine such as a tunnel boring machine may be used. Applicable.

In FIG. 1, reference numeral 1 denotes a tunnel in which excavation is performed by a blasting method, reference numeral 2 denotes a face which is the foremost part of the tunnel 1, reference numeral 3 denotes an excavation chip that has been crushed by blasting in the face 2 and The reference numeral 4 indicates that the excavation waste 3 is crushed to have a uniform size,
a crusher conveyor 4b for transporting a crushed material obtained by crushing excavated waste to a discharge position, and a magnet device provided at the rear end of the crusher conveyor 4b for adsorbing and removing metals. Reference numeral 5 denotes a backup deck which is provided with a reference numeral 5 and is a backup deck which receives a crushed material discharged from the movable crusher 4 and then supplies the crushed material to a continuous belt conveyor while quantifying the same. And a belt conveyor base T on which the leading end of the continuous belt conveyor 5a provided in the tunnel 1 is placed on the work surface.
A second belt conveyor 5c for transporting crushed material discharged from the mobile crusher 4 above the mold stand 5b, and the continuous belt conveyor 5a receiving the crushed material.
A hopper 5d for discharging at the end of the hopper is integrally provided.

FIG. 2 is a side view showing details of the backup deck 5, and FIG. 3 is a view showing the backup deck 5 in FIG.
Arrow view showing the cross-sectional details of (FIG. 3a: aa cross-sectional arrow view,
Fig. 3b is a sectional view taken along arrow bb, and Fig. 3c is a sectional view taken along arrow cc.

In these figures, reference numeral 11 denotes a rail which is a track laid on the construction base surface, and reference numeral 12 denotes a rail mounted on the rail 11 via wheels 12a.
a structural pedestal integrally formed with b, an inclined member 1 formed by processing a steel material such as an H-section steel or a plate;
2b, a horizontal member 12c, and a vertical member 12d are rigidly joined. Reference numeral 13 denotes a work scaffold used as a work floor by an operator 13a when extending the continuous belt conveyor 5a, and reference numeral 14 denotes a structural gantry. Reference numeral 15 is a concrete weight that is provided integrally with the backing deck 12 and applies a load for increasing the stability to the backup deck 5. The reference numeral 15 increases the stability together with the concrete weight 14 by pressing the construction base surface, and further increases the levelness. Outriggers 16 to be secured indicate rail guides provided before and after the wheels 12a to prevent the wheels 12a from coming off the rails 11.

That is, in the backup deck 5 according to the present embodiment, the T-shaped gantry 5b, the second belt conveyor 5c, the hopper 5d, the wheels 12a, and the rail guide 16 are provided integrally with the structural gantry 12. For this reason, the second belt conveyor 5c and the hopper 5d are arranged integrally above the T-shaped frame 5b via the structural frame 12, and the T-shaped frame is mounted via the structural frame 12. 5b
Are configured to run freely.

On the other hand, the continuous belt conveyor 5a has a tip pulley 21 at the tip and a tail piece 22 which can move back and forth on the T-shaped pedestal 5b, and a rear end located at the wellhead (not shown). ) Includes a cassette (not shown) including a rear end pulley, and a carrier roller and a return roller 23 connected between the tail piece 22 and the cassette.
, A plurality of belt conveyor frame units 24 that support the shaft, an endless pulley 21, and an endless rubber belt 25 stretched between a rear end pulley (not shown).

On the other hand, the second belt conveyor 5c has an inclined section and a horizontal section, and has a double pulley 26 at a front end, a carrier roller 27 and a return roller 28 disposed at appropriate intervals, and a drive for a rear end. An endless rubber belt 32 is stretched between a rear end pulley 30 provided with a device 29 and an intermediate pulley 31 provided at a transition point between an inclined section and a horizontal section. Pulley 2
6. The waste crushed material falling from the discharge position near the rear of 6 is once received by a lattice frame (not shown) provided inside (a size of a grid such that the uniformly sized waste crushed material passes with a margin). It has a receiving hopper 33 for supplying to the rubber belt 32 of the second belt conveyor 5c, and has an inclined guide 34 at the forefront of the inclined section and the horizontal section, mainly for preventing the scrap crushed material from falling in the inclined section.

The T-type pedestal 5b according to the present embodiment (ie,
The structural frame 12) integrated with the T-shaped frame 5b is
A traction device that connects the movable crusher 4 and the backup deck 5 and transmits the traction force of the mobile crusher 4 to the backup deck 5 as a traction device that travels toward the face 2 by receiving a reaction force from the movable crusher 4. 41, a stop jig 42 for fixing the pulling wire 41 to the backup deck 5, a winch wire 43 having a tip fixed to the movable crusher 4, and
An electric winch 44 is provided integrally with the front end of the backup deck 5 and can move forward toward the movable crusher 4 by winding the winch wire 43. In the present embodiment, the reaction force is obtained from the mobile crusher 4, but the invention is not limited to this. For example, the reaction force may be obtained from a tunnel boring machine, a ground, or the like. .

The T-shaped frame 5b (that is, the structural frame 12 integrated with the T-shaped frame 5b) further includes a chill climber 5 having the same function as the electric winch 44 at the rear end.
1 and a pulley 5 with a hook, for example.
2 is fixed to the rail 11, and the tip of the wire 53 of the chill climber 51 is hung on the rail 11, and is fixed to the rear end. Has become.

The stretching operation of the continuous belt conveyor by the backup deck 5 is as follows.

First, when the movable crusher 4 moves forward by itself as the face 2 advances, the backup deck 5 moves the traction wire 41 from the movable crusher 4.
The backup deck 5 is pulled forward and travels on the rail 11 (the forward movement of the backup deck 5 may be performed by winding the winch wire 43 by the electric winch 44).

At this time, the tip of the continuous belt conveyor 5a placed on the T-shaped frame 5b is relatively fixed to the T-shaped frame 5b because the continuous belt conveyor 5a is fixed in the tunnel 1. It will slide backward while maintaining the state of being placed on the top, and as a result, T
The dimension of the front end portion with respect to the mold base 5b gradually decreases.

When the length of the leading end reaches the limit at which the continuous belt conveyor 5a can be placed on the T-shaped pedestal 5b, the operation of the continuous belt conveyor 5a is stopped. Of the belts stored in the end cassette, only the required length is stretched.

On the other hand, in the backup deck 5, the worker 13a on the work scaffold 13 releases the connection between the tail piece 22 and the belt conveyor frame unit 24 on the T-shaped pedestal 5b, and the tail piece 22 is moved together with the rubber belt 25. When sliding forward, the stretched and loosened rubber belt 25 is stretched between the front end pulley 21 and the rear end pulley (not shown).

Then, the worker 13a moves the tail piece 22
When a new belt conveyor frame unit is added to the space formed between the belt conveyor frame unit and the belt conveyor unit 24, the stretching operation of the continuous belt conveyor 5a is completed.

Therefore, according to the stretching operation of the continuous belt conveyor 5a, the stretching operation of the continuous belt conveyor 5a, which is conventionally troublesome, can be performed easily and quickly.

Next, the operation of the backup deck 5 according to the present embodiment during operation of the continuous belt conveyor will be described with reference to FIGS.

First, the excavation waste 3 crushed by the face 2 is loaded on a movable crusher 4 by a wheel loader (not shown), and then crushed by the movable crusher 4 to have a uniform size. It becomes crushed material and is placed on the tip of the crusher conveyor 4b.

This crushed material is used as the crusher conveyor 4
When the metal is conveyed to the rear end by b, the metals mixed in the crushed material are absorbed and removed by the magnet device 4c, whereby the sharp metal is dropped by the impact of the drop, particularly the belt portion, A situation in which the rubber belt 25 of the continuous belt conveyor 5a is damaged is avoided.

The crushed material from which metals have been removed falls into the receiving hopper 33 of the second belt conveyor 5c when the supporting force of the crusher conveyor 4b is lost at the discharge position at the rear end.

Then, almost all of the waste crushed material once collides with the lattice frame provided inside the receiving hopper 33, then passes through each frame of the lattice frame and falls on the rubber belt 32. As a result, not only the impact is considerably reduced, but also the unevenness in the amount of the scrap crushed material discharged from the mobile crusher 4 is adjusted.

The scrap crushed material quantified to some extent is integrated when the supporting force of the rubber belt 32 is lost at the time when the rubber belt 32 rotates and is conveyed to the rear end of the second belt conveyor 5c. 5d hopper installed
Fall into

At this time, the hopper 5d exhibits the same function as the receiving hopper 33, and the crushed debris that falls is quantified to some extent. Further, since the grid frame is provided in a plurality of stages, the continuous belt conveyor is provided. The impact of the crushed material on the rubber belt 25 of 5a is substantially eliminated, and the discharge amount of the crushed material supplied onto the rubber belt 25 is also quantified.

Thereafter, the quantified waste crushed material is placed on the rubber belt 25 of the continuous belt conveyor 5a, and is efficiently transported to the wellhead.

Therefore, according to the backup deck 5 of the present embodiment, the work surface is substantially horizontal and has a long front and back work surface,
In addition, while the tip of a continuous belt conveyor 5a provided in the tunnel 1 is placed on the work surface, the crushing of the waste discharged from the mobile crusher 4 is performed above a T-shaped base 5b which can travel back and forth. Since the second belt conveyor 5c that conveys the objects and the hopper 5d that receives the crushed material and discharges the crushed material to the tip of the continuous belt conveyor 5a are integrally disposed, when the crushed material falls, The rubber belt 25 is not damaged by the impact of the above, and a situation in which a large replacement operation is required does not occur, and the above-described stretching operation of the continuous belt conveyor is also facilitated.

In the present embodiment, as a means for reducing the impact of the crushed scraps at the time of falling and quantifying the crushed scraps, the receiving hopper 33 and the hopper 5d and the lattice frame provided inside thereof are used. However, the present invention is not limited to this, and mechanical means such as a feeder may be used.

[0038]

As described above, according to the backup deck according to the present invention, a continuous belt conveyor having a substantially horizontal work surface which is long in the front-rear direction and which is disposed in a tunnel on the work surface is provided. A second belt conveyor for transporting the crushed material discharged from the crusher, above a belt conveyor gantry that can move back and forth while mounting the tip end,
And a hopper that receives the crushed material and discharges the crushed material to the end of the continuous belt conveyor, so that damage to the belt of the continuous belt conveyor due to the impact when the crushed material falls is effective. In addition, the continuous belt conveyor can be easily stretched while avoiding the problem.

In this case, if an outrigger is included, horizontality and stability during operation are ensured, and a moving device that moves forward by receiving a reaction force from the face side is provided. Further, it is expected that the stretching operation of the continuous belt conveyor can be facilitated and speeded up.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a tunnel excavation state to which an embodiment of a backup deck according to the present invention is applied.

FIG. 2 is a side view showing details of the backup deck according to the embodiment.

FIG. 3 is an arrow view showing a detailed cross section of the backup deck according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tunnel 2 ... Face 3 ... Excavation scrap 4 ... Mobile crusher 4a ... Crawler traveling body 4b ... Crusher conveyor 4c ... Magnet device 5 ... Backup deck 5a ... Continuous belt conveyor 5b ... T-type gantry 5c ... Second belt conveyor 5d ... Hopper 11 ... Rail 12 ... Structural stand 12a ... Wheel 12b ... Inclination member 12c ... Horizontal member 12d ... Vertical member 13 ... Work scaffold 13a ... Worker 14 ... Concrete weight 15 ... Outrigger 16 ... Rail guide 21 ... Tip pulley 22 ... Tail piece 23 Carrier roller and return roller 24 Belt conveyor frame unit 25 Rubber belt 26 Double pulley 27 Carrier roller 28 Return roller 29 Driving device 30 Rear end pulley 31 Middle pulley 32 Rubber belt 33 ... Receiving hopper 34 ... Inclination guide 41 ... Towing wire 42 ... Stopper jig 43 ... Winch wire 44 ... Electric winch 51 ... Chill climber 52 ... Pulley with hook 53 ... Wire

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[Procedure amendment]

[Submission date] April 1, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

To achieve the above object, according to the Invention The backup deck according to the present invention, rather long back and forth in a substantially horizontal, have a working surface subjected to the stretching working of the continuous belt conveyor, the tunnel The tip of the continuous belt conveyor provided in the above-mentioned work surface is slidably mounted on the work surface, and the crushed material discharged from the face is conveyed to a position above the belt conveyor gantry which can travel back and forth. It is characterized in that a two-belt conveyor and a hopper that receives the crushed material and discharges it to the tip of the continuous belt conveyor are integrally provided.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

[0038]

As described in the foregoing, according to the backup deck according to the present invention, rather long back and forth in a substantially horizontal, continuous base
Have a working surface subjected to the stretching working belt conveyor, the leading end of the continuous belt conveyor deployed within the tunnel, the operation
A second belt conveyor that conveys the crushed material discharged from the crusher above the belt conveyor gantry that can freely move back and forth while being slidably mounted on the work surface , and receiving the crushed material. Since the hopper that discharges to the end of the continuous belt conveyor is arranged integrally, it is possible to effectively avoid damage to the belt of the continuous belt conveyor due to the impact of the falling crushed material while falling. This facilitates the stretching operation.

Claims (3)

[Claims] 1. A belt conveyor gantry having a substantially horizontal, long front-to-back work surface, and capable of running back and forth while placing the tip of a continuous belt conveyor provided in a tunnel on the work surface. A second belt conveyor that conveys the crushed material discharged from the face, and a hopper that receives the crushed material and discharges the crushed material to the tip of the continuous belt conveyor. And backup deck. 2. An outrigger, comprising:
The backup deck according to claim 1. 3. The backup deck according to claim 1, further comprising a traction device for traveling forward by obtaining a reaction force from the face side.